[Solved] Second div no wider than first div


This should solve your request:

.container {
  display: inline-block;
  background: aliceblue;
  min-width: 210px;
  min-height: 85px;
  position: relative;
}

.maxim {
   position: absolute;
   width: 100%;
   max-width: 100%;
   background-color: lime;
}
<div class="container">
    <header>
        <strong>12345620</strong>
        <span>description</span>   
    </header>
    <span class="maxim">
        Lorem ipsum  Lorem ipsum  Lorem ipsum  Lorem ipsum  oposum
    </span>    
</div>    
        
<div class="container">
    <header>
        <strong>1234567890</strong>
        <span>description and more text is here also possible</span>   
    </header>
    <span class="maxim">
        Lorem ipsum  Lorem ipsum  Lorem ipsum  Lorem ipsum  oposum
    </span>    
</div> 

2

solved Second div no wider than first div